简介:A USGS analytical method using gas chromatography/mass selective detector (GC/MSD) was modified and used to identify the source of pesticides and to calculate the pesticide load in river water during storm seasons. The m简介:A USGS analytical method using gas chromatography/mass selective detector (GC/MSD) was modified and used to identify the source of pesticides and to calculate the pesticide load in river water during storm seasons. The method was validated to cover 12 organophosphate pesticides and 5 pyrithroids. The limits of quantitation for these target compounds are 10?00 ppt using a GC/MSD selected ion monitoring (SIM) method详细>